Armchair



FIG. 1 is a perspective view of the left, top, and front sides of the armchair of our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a back view thereof; and,

FIG. 8 is a perspective view of the left, top, and front sides of the armchair in a reclined position of our new design.

The broken lines shown in the drawings represent portions of the armchair that form no part of the claimed design. 

CLAIM The ornamental design for the armchair, as shown and described. 